what is your favourite/most treasured item of clothing

mine is a claret fred perry polo shirt that belonged to my dad, he was wearing it in rotterdam when aston villa won the european cup in 1982, and it has a tiny cigarette burn on it from when he jumped up when peter withe scored. and it fits me really well and generally looks great. i don't like to wear it out much though because i'm terrified of somehow losing/ruining it

so what's your favourite item of clothing? (it doesn't necessarily have to have a boring story behind it)